CHALK -A-

Oil // district 10 // lease#31394

op: EXCEL ENERGY CO.

cum_oil

188k BBL

cum_gas

0 MCF

wells

8

production

1993-01 — 2012-03

peak_month

1993-05

-- production_history

cum_oil: 188,410 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

1,065 BBL/mo

Di (annual)

3.9%

b-factor

1.3

EUR

368,119 BBL

R-squared

0.782

type

hyperbolic

-- wells (8)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
9CALLEY, BOB13,1001986-12-16
8CALLEY, BOB13,1001986-08-14
142-227-00163--------
242-227-04330--------
342-227-02479--------
542-227-02478--------
642-227-02481--------
742-227-30036--------
EOF // multi-state drilling data platform // 2026